与N-甲基-d-glucamine功能化的石墨烯氧化物作为一种新型吸附剂,用于从生产和形成水中去除
Izylla O de Lucena1, Jefferson S de Gois2, Ricardo J Cassella1
1Departamento de Química Analítica, Universidade Federal Fluminense Outeiro de São João Batista s/n, Centro Niterói/RJ 24020-141 Brazil rcassella@id.uff.br.
RSC advances
|February 12, 2024
概括
一种新型的石墨烯氧化物材料与N-甲基-d-glucamine (NMDG@GO) 功能化,可以选择性地从水中去除. 在优化条件下,可以从石油生产水中去除22-35%的,这表明多层吸附.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 吸附科学 吸附科学
背景情况:
- 水性环境中的污染对环境和健康构成风险.
- 石墨烯氧化物 (GO) 是一个有前途的材料,用于水资源整治,由于其较大的表面积和可调节性质.
- 从盐水中选择性去除,特别是从石油生产源中去除,仍然是一个重大挑战.
研究的目的:
- 为了合成和描述一种新的功能化石墨烯氧化物材料,用于选择性去除.
- 为了研究吸附动力学和控制吸附过程的异热量.
- 为了优化吸附参数,以便有效地从盐油生产水中去除.
主要方法:
- 石墨烯氧化物 (GO) 与N-甲基-d-葡萄胺 (NMDG) 功能化,以创建NMDG@GO吸附剂.
- 使用FTIR,SEM,XRD,TGA,AFM和元素分析进行材料表征.
- 吸附研究采用动力学模型 (伪第一阶,伪第二阶) 和异温模型 (Langmuir, Freundlich),通过中央复合材料设计进行参数优化.
主要成果:
- 合成的NMDG@GO材料已成功表征,证实了成功的功能化.
- 吸附动力学遵循伪二阶模型,而吸附同热量最适合弗洛伊德利希模型,表明异构位点上的多层吸附.
- 在优化条件下 (120毫克吸附剂,pH值2.0,40分钟) 从盐油生产水中去除了22-35%的.
结论:
- NMDG@GO是一种有效的吸附剂,用于从水溶液中选择性去除.
- 弗洛伊德利希等温和和伪二次动力学表明一个复杂的吸附机制.
- 开发的材料显示了从石油生产中处理污染的盐水的潜力,有助于环境修复工作.
相关概念视频
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The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
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